in general, up to 100lbs of personal items can be packed into the trunk/cargo area of the vehicle you're shipping. This rule applies as long as the items are safely secured within a suitcase or a single box.
The front seats and their respective floorboards must be completely empty, devoid of any personal items. The same applies to the backseats and their floorboards unless you've obtained a comprehensive rate that permits items in these areas.
According to the
Department of Transportation (DOT) regulations, the shipment of items outside of a vehicle on an open transport trailer is strictly prohibited. if you're using an enclosed auto transport trailer, you can include additional items such as a securely crated engine or transmission.